Eventually people get tired and listen to populists. That's why they get elected, because they'll tell you what you want to hear. Whether they actually have any plans of doing it or not is almost irrelevant when you're dealing with bullshit on both sides.

The only way to beat populists is to have actual concrete plans, which as far as I saw as a non-USAian at least, the democrats barely ever spoke of, and it seems to be the common sentiment across this thread as well.

Denmark is a good example of what I mean, they had a surge in right-wing populist parties due to people's ongoing and ignored issues with Illegal immigration (among other things). Know what the moderates, who were in power, did? They adjusted their policies accordingly with actual concrete plans that they set in motion. And to no one's surprise, the populist parties died down and people calmed down in general once they saw that action was actually being taken.

To be fair, Democrats are historically only marginally better in that regard.